Depolarizing agent.



STATES PATENT OFFICE}. east-mm Ennis, or' iyronronarn, nw'innsnmnssienon, BY ivrnsivn .assreiviannals,

- 'ro Ramona; CARBON ooivrraiw, A conr'onarronor NEW JERSEY.

m5 Drawing. 7

To' all whom it m/a3 concern! Be it-known that I; CARLE'roN ELLIs, a citizen of the United States, andaresident of-Montclai'r, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in -Depolariz-.

fication.'- v

'This. invention. relates to depolarizing ing Agents, of which the following is a speci--;

agents adapted for dry batteries, of the Leclanch type especially the form known asthe miniature dry battery u;ed in pocketv flashlights and the invention has to do particularly with complex manganese compounds preferably compounds resulting from fusion operations particularly complexes 'of'manganites and manganates, and specifically is concerned .withcrystalline hi her oxid complexes.

anganese dioxid especially in the hydrated iorm *isregarded as-an acid body "which/under some. conditions takes on a basic' charact'er or at least combines into a complex in which it presumably exerts the mfluen'ceof a' base and this is particularly the case withimanganic acid with which it fozrm'aafcomplex along with ,the other elements. (An example of such compound is formula] BaM oin o. "or o .Mno.'.s ao.nJ o.

barium manganite manganate having-I the.

' arium manganite. manganate may be;

prepared by fusing together a mixture of barium hydroxid, 'potassium nitrate and potassium permanganate. should be thoroughly mixed" together and heated to a temperature of about 280 LIhe mix may be made from .1 molecular proportion of potassium ermanganate, 4:

molecular proportions of arium hydroxid and molecular proportions of potassium nitrate By careful. heating these ingredients afford a more or less granular and crystalline material. This compound is basic as shown by the formula-above. The barium may be replaced in this formula by manganous oxid and a. depolarizing agent obtained which may be usedalone or in admixture with the barium compound.

In a similar manner a series of derivatives;

of this 'complex with other elements may be prepared and owing to the peculiar com-'- plex structure unstability, ens- Specification of Letters Patent.

The materials DEBOLARIZING- AGENT.

depolarizing action. without however involving the presence of acid bodies whichmight "cause local action causing the battery torun "down whenstanding.

Substantially crystalline or semi-crystalline products may be obtained which mix to advantage with mineral manganese and graphiteto form a good depolarizing agent.

A mixture of about equalparts of the manganese complex with mineral manganese or equivalent material and combined with an graphite furnishes an eff-- compressed into blocks or molded about a carbon electrode which-may be immersed in atented Aug. 14,1917. Application filed October 25,1915. Serial No. 57,680.

'. ables the o'xygenlof this material to be given I up with great ease, thereby. afiordingrapid an ammonium chlorid exciting. liquid or paste carried in a zinc container.

The foregoing specific illustration of. a

depolarizing complex is ,not of the nature of a polymanganite but'is .built'up of man'- ganese dioxid and manganic acid or other higher oxygenated compound of manganese.

1 Various other manganates may be used especially those derivedfby fusion processes yielding a crystalline-like or'pseud'o-crystalline depolarizing agent which is dense like natural manganese dioxid'of the pyrolusite type but unlike pyrolusite is very active as a depolarizer. The use of a fused depolarizer is a feature of this invention and in so "A further modification of the invention consists in incorporating an artificial. amorphous manganese dioxid or a simple man ganous manganite with fused sodium nitrate and allowingi the particles of manganese material to e far as the application of fused depolarizing nsify in the .molten' vehicle.

This may be heated far; above the point at which the dioxid loses oxygen and a sort 1 Manganite-mangan'ates are obtained of crystallization or densification thus oc-'' curs. by digestion for, .a considerable period at a mg lpoint of the nitrate.

temperature about 100200.abov'e thejmelte composition the fore-flip.

going formula ma be suitably digested under these conditions to produce the product desired.

What I claim is 1. As a depolarizing agent a manganite manganate.

2. As a depolarizing agent a complex containing manganese dioxid and manganic acic.

' 3. As a depolarizing agent a complex of 21 o L b crystalline character containing manganese dioxid and manganic acid.

4:. As a depolarizing agent a complex con- 'taining manganese dioxid and manganic acid admixed with carbon.

5. As a depolarizing agent a fused artificial higher oxid of manganese, substantially free from natural manganese dioxid and containing manganlc acid.

GARLETON ELLIS. 

